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Electronics Worksheet: Cells and Batteries

Electronics lesson 6: Cells and batteries · Set 407 · 40 questions
TalentJR

Remember (Line them up, add them up): Series (+ to −): total voltage = add the cells; n identical cells = n × one cell. Parallel (identical cells, + with +): the voltage stays the same as one cell. The bump end is +, the flat end is −; the long line in the symbol is +.

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  1. 1.True or false: on a cell, “the shorter symbol line” means the + (positive) end. (a) False (b) True
  2. 2.🔋 Cells joined + to − in a row (series) give … (a) the same voltage (b) a smaller voltage (c) a bigger voltage (d) no voltage
  3. 3.True or false: on a cell, “usually the red wire” means the − (negative) end. (a) False (b) True
  4. 4.🔋 How many 1.2 V cells must be joined in series to give 8.4 V?
  5. 5.True or false: on a cell, “the flat end” means the + (positive) end. (a) False (b) True
  6. 6.🔋 7 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
  7. 7.🔋 A 12 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  8. 8.🔋 What is a battery? (a) two or more cells joined (b) a switch with a lid (c) one single wire (d) a kind of bulb
  9. 9.🔋 6 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  10. 10.🔋 3 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  11. 11.🔋 3 identical 1.2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  12. 12.🔋 Identical cells side by side (in parallel) give … (a) half the voltage (b) double the voltage (c) no voltage (d) the same voltage
  13. 13.🔋 3 identical 2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  14. 14.True or false: on a cell, “the longer symbol line” means the + (positive) end. (a) False (b) True
  15. 15.🔋 A 3 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  16. 16.🔋 On a cell, does “the end with a bump” mean the + end or the − end? (a) + (positive) (b) − (negative)
  17. 17.🔋 How many 1.5 V cells must be joined in series to give 4.5 V?
  18. 18.🔋 On a cell, does “usually the black wire” mean the + end or the − end? (a) + (positive) (b) − (negative)
  19. 19.🔋 3 identical 1.5 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =
  20. 20.True or false: on a cell, “usually the red wire” means the + (positive) end. (a) False (b) True
  21. 21.True or false: on a cell, “the end with a bump” means the + (positive) end. (a) False (b) True
  22. 22.True or false: on a cell, “usually the black wire” means the − (negative) end. (a) True (b) False
  23. 23.🔋 3 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
  24. 24.🔋 2 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  25. 25.🔋 On a cell, does “usually the red wire” mean the + end or the − end? (a) − (negative) (b) + (positive)
  26. 26.🔋 How many 1.2 V cells must be joined in series to give 4.8 V?
  27. 27.🔋 On a cell, does “the longer symbol line” mean the + end or the − end? (a) − (negative) (b) + (positive)
  28. 28.🔋 How many volts does one ordinary torch cell give? (a) 15 V (b) 0.5 V (c) 230 V (d) 1.5 V
  29. 29.🔋 A 3 V battery and four 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  30. 30.🔋 A 6 V battery and two 1.5 V cells are joined in series, all facing the same way. What is the total voltage (in volts)? =
  31. 31.🔋 2 identical 3 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  32. 32.True or false: on a cell, “usually the black wire” means the + (positive) end. (a) True (b) False
  33. 33.🔋 How many 1.2 V cells must be joined in series to give 7.2 V?
  34. 34.🔋 7 identical 1.5 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  35. 35.🔋 A 6 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  36. 36.🔋 6 identical 1.5 V cells are joined in series, but one of them is put in the wrong way round. What is the total voltage now (in volts)? =
  37. 37.🔋 On a cell, does “the flat end” mean the + end or the − end? (a) + (positive) (b) − (negative)
  38. 38.🔋 6 identical 1.2 V cells are joined in series (+ of one cell to − of the next). What is the total voltage (in volts)? =
  39. 39.🔋 A 9 V battery and one 1.5 V cell are joined in series, all facing the same way. What is the total voltage (in volts)? =
  40. 40.🔋 5 identical 2 V cells are joined side by side in parallel (all + ends together, all − ends together). What is the voltage across them (in volts)? =

Answer key

  1. False
  2. a bigger voltage
  3. False
  4. 7
  5. False
  6. 7.5
  7. 13.5
  8. two or more cells joined
  9. 1.2
  10. 2
  11. 1.2
  12. the same voltage
  13. 6
  14. True
  15. 6
  16. + (positive)
  17. 3
  18. − (negative)
  19. 1.5
  20. True
  21. True
  22. True
  23. 1.5
  24. 3
  25. + (positive)
  26. 4
  27. + (positive)
  28. 1.5 V
  29. 9
  30. 9
  31. 6
  32. False
  33. 6
  34. 10.5
  35. 7.5
  36. 6
  37. − (negative)
  38. 7.2
  39. 10.5
  40. 2

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